[Iaude] MPEC X166: 2021 XE4 [a=2.46,e=0.60,i=17.3,H=23.9]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 06:45:18 EST 2021


M.P.E.C. 2021-X166                             Issued 2021 December 9, 11:43 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
    on behalf of Division F of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                    2021 XE4                                    


Observations:
     K21X04E  C2021 12 02.36035 06 11 04.22 -14 32 50.9          18.2 GVEX166703
     K21X04E  C2021 12 02.36600 06 11 05.85 -14 30 07.1          18.7 GVEX166703
     K21X04E  C2021 12 02.37165 06 11 07.58 -14 27 21.7          18.6 GVEX166703
     K21X04E* C2021 12 08.34789206 40 03.43 +26 40 38.9          19.12GVEX166G96
     K21X04E  C2021 12 08.35307906 40 04.36 +26 42 09.8          19.24GVEX166G96
     K21X04E  C2021 12 08.36343706 40 06.20 +26 45 11.1          19.33GVEX166G96
     K21X04E mC2021 12 08.40061606 40 12.85 +26 55 57.1          19.27GVEX166I52
     K21X04E mC2021 12 08.40086206 40 12.91 +26 56 01.5          19.21GVEX166I52
     K21X04E mC2021 12 08.40110806 40 12.94 +26 56 05.6                VEX166I52
     K21X04E mC2021 12 08.40135506 40 12.98 +26 56 09.9                VEX166I52
     K21X04E mC2021 12 08.44150606 40 20.24 +27 07 40.8          19.33GVEX166I52
     K21X04E mC2021 12 08.44175306 40 20.29 +27 07 44.8                VEX166I52
     K21X04E mC2021 12 08.44199906 40 20.33 +27 07 49.1                VEX166I52
     K21X04E mC2021 12 08.44224506 40 20.39 +27 07 53.4          19.23GVEX166I52
     K21X04E KC2021 12 09.14167906 43 05.64 +30 18 36.6          19.6 VZEX166W33
     K21X04E KC2021 12 09.15265506 43 07.61 +30 21 30.0          18.8 VZEX166W33
     K21X04E KC2021 12 09.16364306 43 09.71 +30 24 23.7          19.7 VZEX166W33
     K21X04E KC2021 12 09.25905606 43 26.88 +30 48 56.2          19.1 VuEX166H21
     K21X04E KC2021 12 09.26098606 43 27.21 +30 49 25.9                uEX166H21
     K21X04E KC2021 12 09.26291606 43 27.56 +30 49 55.3                uEX166H21
     K21X04E KC2021 12 09.26484506 43 27.85 +30 50 25.0          19.0 VuEX166H21

Observer details:
703 Catalina Sky Survey.  Observer R. A. Kowalski.  Measurers B. Gray, D.
    Rankin, F. C. Shelly.  0.68-m Schmidt + 10K CCD.
G96 Mt. Lemmon Survey.  Observer R. A. Kowalski.  Measurers E. J. Christensen,
    G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
    Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L. Seaman, F. C.
    Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer H. Groeller.  Measurers
    E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.
W33 Transit Dreams Observatory, Campobello.  Observer D. Wilde.  0.36-m f/2
    Schmidt-Cassegrain + CCD.

Orbital elements:
2021 XE4                                                 Earth MOID = 0.0504 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  17.88313              (2000.0)            P               Q                  
n   0.25575972     Peri.  328.77816     +0.67631817     -0.67742665             
a   2.4579967      Node    76.86662     +0.72214510     +0.53232009             
e   0.5977295      Incl.   17.28091     +0.14525905     +0.50766964             
P   3.85           H   23.95          G   0.15           U   9                  
Residuals in seconds of arc
211202 703  0.2+  0.3-    211208 I52  0.1+  0.1+    211209 W33  0.1+  0.1-
211202 703  0.5-  0.5-    211208 I52  0.1-  0.1-    211209 W33  0.9-  0.0
211202 703  0.3+  0.8+    211208 I52  0.1-  0.0     211209 W33  0.2+  0.6+
211208 G96  0.1+  0.0     211208 I52  0.1-  0.1+    211209 H21  0.0   0.1+
211208 G96  0.1+  0.1-    211208 I52  0.0   0.2-    211209 H21  0.0   0.1+
211208 G96  0.1-  0.1+    211208 I52  0.1-  0.1-    211209 H21  0.2+  0.1-
211208 I52  0.1-  0.0     211208 I52  0.1+  0.0     211209 H21  0.3-  0.1-

Ephemeris:
2021 XE4                 a,e,i = 2.46, 0.60, 17                  q = 0.9888
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 09    01 57 20.0 -78 26 09   0.1803  0.9895    84.4    85.1    23.2
...
2021 11 24    05 04 57.5 -61 08 48   0.08402 1.0014    97.3    78.0    21.3
...
2021 12 02    06 08 53.0 -17 24 46   0.05310 1.0237   134.1    43.8    19.3
...
2021 12 08    06 38 40.8 +24 56 42   0.06670 1.0468   157.0    21.6    19.2
2021 12 09    06 42 28.4 +29 41 48   0.07169 1.0512   156.6    21.8    19.4
2021 12 10    06 45 58.8 +33 47 40   0.07715 1.0557   155.8    22.5    19.6
...
2021 12 16    07 01 50.3 +48 57 59   0.1160  1.0853   149.0    27.8    20.7
...
2021 12 24    07 12 38.1 +57 07 46   0.1757  1.1311   144.4    30.4    21.8
...
2022 01 08    07 16 56.0 +61 00 58   0.2999  1.2317   141.3    30.0    23.1

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X166




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